Revision: 17196
                            
                                                            
                                    
                                        
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                        at August 26, 2009 15:15 by cyberhobo
                            
                            Initial Code
function in_subcategory( $cat_id ) {
	$subcats = get_term_children( $cat_id, 'category' );
	if ( $subcats && !is_wp_error( $subcats ) ) {
		foreach( $subcats as $child_category ) {
			if( in_category($child_category) ) {
				return true;
			}
		}
	}
	return false;
}
                                Initial URL
http://codex.wordpress.org/Function_Reference/get_term_children
Initial Description
Usually use in a template with `in_category()`, like `if ( in_category( 3 ) || in_subcategory( 3 ) ) { ...`. Tested in WP 2.8.4.
                                Initial Title
WordPress: in subcatory?
Initial Tags
wordpress, category
Initial Language
PHP